Difference between revisions of "SIP/2.0 503 Service Unavailable"

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Got SIP response 503 "Service Unavailable." back from 23.45.67.89
Got SIP response 503 "Service Unavailable." back from xxx.xxx.xxx.xxx


Check codecs for your server and your provider. Often there are no matching and call is not possible.
Check codecs for your server and your provider. Often there are no matching and call is not possible.


503 "Service unavailable: no more gws" back from 22.33.44.55 - Provider does not have more open lines to serve your calls.
503 "Service unavailable: no more gws" back from xxx.xxx.xxx.xxx - Provider does not have more open lines to serve your calls.




Usually this is provider problem.
Usually this is provider problem.


Add international prefix to the number as described [[Provider drops the call | here]]


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If device is unreachable, MOR returns such error to called.
If device is unreachable, Asterisk returns such error to caller.




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'''Check also:'''
'''Check also:'''
* [[SIP Error Codes]]
* [[SIP Error Codes]]
* [[Provider drops the call]]

Latest revision as of 10:28, 6 May 2010

Got SIP response 503 "Service Unavailable." back from xxx.xxx.xxx.xxx

Check codecs for your server and your provider. Often there are no matching and call is not possible.

503 "Service unavailable: no more gws" back from xxx.xxx.xxx.xxx - Provider does not have more open lines to serve your calls.


Usually this is provider problem.


Add international prefix to the number as described here



If device is unreachable, Asterisk returns such error to caller.



Check also: